Do not get angry

Abu Hurairah (radi Allahu anhu) reported: A man asked the Prophet (sal Allahu alaihi wa sallam) to give him advice, and He (sal Allahu alaihi wa sallam) said, “Do not get angry.” The man repeated that several times and He (sal Allahu alaihi wa sallam) replied (every time), “Do not get angry.”

[Sahih Al-Bukhari]

Commentary:

We benefit from the above Hadith that an advice should be made as circumstances demand. When The Messenger of Allah (sal Allahu alaihi wa sallam) perceived by his insight that the visitor was a person of sharp and fiery temper, he repeatedly advised him to resist anger.